66 J. SMITH ON THE GENERA OF FERNS. 



allies are formed by a linear confluence of the sporangiferous 

 points, as noticed under the preceding genus, and which 

 proves the affinity of these genera with Drynai'ia. 



29. Drymoglossum. Presl. J. Sm. 



(Pteridis sp. Linn. Taenitidis sp. R. Br. Pteropsidis sp. 



Desv. Presl. Nothochl^enie sp. Kaulf.) 



Venation uniform, compound, anastomosing, producing 

 variously directed, free veinlets. Sporangia produced on the 

 transverse sides, and junctions of the marginal venules, form- 

 ing a linear, continuous, transverse marginal or intramargi- 



nal sorus Fronds simphy elliptical or lanceolate^ coriaceous^ 



the fertile contracted, sometimes soriferous at the apex only. 

 Sori pilose or squamiferous. 



Species. 1. D. piloselloides ; Presl. 2. D. spathulatum ; 

 Presl. 3. D. carnosum; J. Sm. (Niphobolus, A. Cunn.) 

 4. D. lanceolatum ; {Linn.) Illust. Schk, crypt, t. 87. Hook. 

 gen.Jil. 



30. T^NiTis. Sw. 



Venation uniform, reticulated, sporangiferous receptacle 

 transverse, elongated, forming a linear, continuous, or inter- 

 rupted central sorus. — Fronds pinnate, coriaceous. Veins 

 forming oblique elongated areoles, which are crossed transversely 

 by the sporangiferous receptacle. 



Species. T. blechnoides; Sw. — Illust. Schk. crypt, t. 6. 

 Schott. gen.fil, ^ 20. Hook gen.fil, 



31. Pteropsis. Desv. 

 (Pteridis sp. Linn. Taenitidis sp. Willd. Spreng.) 

 Venation uniform, reticulated, sporangiferous receptacle 

 produced on the transverse marginal anastomosing of the 

 venules, forming a linear, continuous, marginal sorus. — 

 Fronds simple, forked or pinnatifid, coriaceous. Veins form- 

 ing elongated areoles. Sori rarely interrupted, sometimes 

 occupying the apex of the frond only, which is then slightly 

 contracted. 



